Channel cutting presser foot



May 2, 1933. H. w, KRN'; 1,906,624

CHANNEL CUTTING PRESSER FOOT Filed Sept. 8, 1931 1/15 Ar 1- ORNEKS.

Patented May 2, 1 9

' ESTATES- I IiARR-YWrKRAG, or s'r. LOUIS, MISSOURL'ASSIGNOR TO AMERICANSHoEMACHINERY {AND r001. COMPANY, or ST. LOUIS; MISSOURI,' -Aoonrona'rlon, or, MISSOURI r ouTriNG-rREssER ro'orf p Application filedSeptember 8,1931; Serial No. 561,557; I

"This1invention relates to 'presser feet for shoe sole sewing machines,particularly presser feet of the kind provided with means for cuttingathread, receiving channel in i The V the shoe sole in advanceof theneedle.

principal object ofthe present inventlon is tdprovide a channel cuttingpresser foot with simple and efficient means for ad usting the channelcutter to bringit in line with 10 the needle and to vary the depth ofout. An-

' other object is to provide meansifor readily securing the channelcutter in the desired adjusted position, Other objects are simip'licity, economy andcompactness of design.

- The invention consists in the channel cut ting presser foot and in theconstruction, I combinations and arrangements of parts hereinafterdescribed and-claimed; I

i In the accompanying drawing, which '20 formspartfof this specificationand wherein likesymbols refer to like 'parts, wherever they i F ig;l'is'a pla n v'iew of a channel cuttingi v 4 of the channel cutter toclamp the top face resser foot embodying my invention, 'Fig. 2qi's afront elevation thereof,

' )Fig. 3 is asideviewof said presser foot,

Fig; a; bottom plan viewof saidpresser I Fig5 is a cross-jsectionfontheline in Fig.--2;fand f x p *Fig. 6 is across-section on the l ne 6 -6inFig-QP v Referring to'lthe' accompanying drawing, my'channel cuttingpresser--foot comprises a shank portion; 1 which is adapted to be 'se-'cured, preferably by means of cap screws 2, to the free end of'the,presserfoot lever (not shown) of a'slioes'ole sewingmachine. The shankportion l of the presser foot is provided a'tf its lower or outer-endwithan en'- 7 f larged body portion 3 having a presserfoot portion 4:that projects horizontally from one side thereof for pressing the shoesole against 7 he work supportj(not shown) of the sewing machine. i sSlida'bly mounted in'a'n inclined rectangular groove provided thereforin the front face of the enlarged'body-portionB of the presser foot isa, cutter 6 one end of which extends far enough below the pre'sser footto cut asaid groove and forming the rear'end por-. tion of the bottomwall,thereof." The cla1np- 7 ing memberis forced upwardly to force thetherein. The" inner end of this screw receivis provided with a conicalor tapered inner end portion 13 adapted to enter a conical redisposedflatwiseagainst the ,top wall of said groove and withits lowerledgedisposed ad jacent to thebottom wall thereof.

a The triangular channel cutterfi is clamped in the groove 5 by meansofa clamping mem her, which comprises a cylindrical shank poition8,,having across-flange orh'ead 9 at'its lower end. The clampingmemberismounted on the presserffoot with its shank portion 8' slidablyengagingafbore 10 that extends through theenlarged body portion 3 ofsaid presser foot back of andat right angles to I thecutter receiving,groove 5 and with its cross-head or flange 9 disposed crosswise of Icross-flange 9 thereof against the bottom edge; ofsaiddcutterfagainstthe'topwall of 'the75 groove 5 by means of a screw ll mounted in ascrewthreaded opening 12 provided there for'in the front face of the.enlarged'portion 3 of the presser' foot; above the groove 5* so ingopening 12 communicates with the bore 10 that slidabl'y receivestheshank portion '8 of the clamping member; and the screw 11 85.. cess14 provided thereforin the side of said shank portion. By thisarrangement, when J the-screw 11 is tightened the'con'ical inner endportion 13 thereof is forced against the conical surface'of the recess14 in the shank portion 8 of the clamping member thereby causing saidmember to travel 'upwardly r" This upward travel of'the clamping membercauses thecrossflange 9 thereof to press upwardly against'the lower edgeof the channel cutter'fiand thus firmly clamp thefiat upper face thereofagainst the top wall of the groove 5 therefor; As shown in the draw ing,the'cross-fla'nge 9 ofthe clamping memher is provided with a channel15-having a flat surface at its bottom adapted to permit a slight sideplay of said edge of said cutter therein. 7

The channel cutter 6 is adjusted horizontally in a direction transverseto its length by means of an adjusting screw 16, which is threaded in anopening 17 provided therefor in the front face of the body portion 3 ofthe presser foot adjacent to the front end portion of the top wall ofthe cutter receiving groove 5, the screw receiving opening 17 opens intothe groove 5 through the top wall thereof; and the adjusting screw 16isprovided with an annular groove 18 adapted to receive the flat upperface of the channel cutter 6 located in the groove 5; arrangement,manipulation of the screw 16 causes the same to move in the direction ofits ,axis, which movement, by reason of the engagement between theannular groove 18 in said screw with the channel cutter 6, causes saidchannel cutter to be shifted in a'direction transverse to its length. Asstated above, the. crosswise moven'ient of the rear end portion .of .thechannel cutter 6 is restrict-edby means of the channel 15 in thecross-flange 9 of the clamping member, thus causing the rear end portionof said cutter to remain in said channel while permitting a greateramount .of crosswisemovement of said cutter at the forward end thereof.In practice, a slight clearance is provided between the channel cutterand the side walls of the annular groove in theadjusting screw 16 inorder to prevent binding of said cutter in said groove when the movementof the forward end of said cutter is greater than the movement of therear .end thereof. The pressure-of the ac ljusting screw 16 on thechannel,

cutter is sufficient to overcome the-friction between the top faceOf,SL1(l channel cutter and the top wallof the groove therefor, there bypermitt ng crosswise adjustment of the cutter without releasing theclamping mem ber. However, when it is desired-to adjust the channelcutter in the direction of its length, it is necessary to release theclamping member by loosening the screw 11 which presses the cross-flangeof said. clamping member against the bottom; edge of said channelcutter.-

hat I .claim is y:

1.. A channel cutting presser foot having a plane surface, a channelcutter having a plane surface cooperating with the plane surface of saidpresser foot, means on said presser foot cooperating .directly'with saidchannel cutter for moving the same transversely of its length, and meanson said presser foot for clamping the plane surface of Said channelcutter against the plane surface of said presser foot. y

2. A channel cutting presser foothaving a plane surface, a channelcutter having a 7; plane surface cooperating with theplane By thissurface of said presser foot, means on said presser foot cooperatingwith said channel cutter for moving the same transversely of its length,and means on said presser foot for clamping the plane surface of saidchannel cutter against the plane surface of said presser foot, saidclamping means comprising a member having a shank port-ion mounted insaid presser foot for sliding movement transversely of said channelcutter and having a portion adapted to bear against said channel cutterto press the plane surface of the "latter against the plane surface ofsaid presser foot. y

3. A channel cuttingpresser foot having a plane surface, a channelcutter comprising a triangular bar mounted on said presser foot with oneof its faces cooperating with said plane surface, a screw threaded intosaid presser foot substantially at right angles to said triangular barand having an annular groove adapted to straddle said bar, and a memberhaving a shank portion mounted in said presser for sliding movementtrans-versely of said bar and said screw and having a flange adapted tobear against said bar to clamp said face thereof against the planesurface of said presser foot.

4. A channel cutting presser foot having a plane surface, a channelcutter comprising a triangular bar mounted on said presser foot 7 saidtriangular bar and having an annular groove adapted to straddle saidbar, and a member having a shank portion mounted in saidpresserforslidingmovementtransversely of said bar and said screw andhaving a flange adapted to bear against said bar to clamp said facethereof against .the'plan'e' surface of said presser foot, said shankportion of said clamping member being provided with a ta pered recess,and a screw threaded in said presser foot at right angles to said shankpor tion and having a tapered end portion adapted to cooperate with saidtapered recess.

5. A channel cutting presser foot having a plane surface, a channelcutter comprising a triangular bar mounted on said presser foot with oneof its faces cooperating With said plane surface, a screw threaded intosaid presser foot substantially at right angles to said triangular barand having an annular groove adapted to straddle said bar near thecutting end thereof, a member having a shank portion mounted in saidpresser for sliding movement transversely of said bar and said screw andhaving a flange adapted to bear against said bar to clamp said facethereof against the plane surface of said presser foot, said shankportion of said clamping member being provided with a tapered recess,and a screw threaded in said presser foot at right angles to said shankportion and having a ta-,

pered end portion adapted to cooperate with said tapered recess, the barengaging portion, of said flange of said clamp member compris ing achannel formed in said flange and shaped to permit limited side play ofthe portion of said bar cooperating therewith.

6. A channelcutting presser foot having a groove therein, achannelfcutter slidable in said groove, and means on said, presser footcooperating directly with said channel cutter for moving the sametransversely of said groove. I i a e a 7. A channel cuttingpresser foothavinga groove therein, a channelcutter slidable in said groove,'meanson said presser foot co-, operating with said channel cutter for movingthe same transversely of said groove,'said means comprising a screwthreaded into said presser foot transversely of said channel cutter andhaving an annular groove adapted to straddle said channel cutter andmeans on a said presser foot'for clamping said channel cutter in saidgroove. a V 8. A channel cutting presserfoot having a groove therein, achannel cutter shdable 1n said groove, means onsaid presser foot co-1operating with said channelcutter for mov-' ing the same transversely ofsaid groove, and

means onsaid presser foot for clamping said channel cutter insaidgroove, said clamping,

means comprising amember having a shank portion mounted in said presserfoot for slidmg movement transversely of sald channel cutter andhavingaflange adapted to bear against said channel cutter to force thelatter ing movement transversely of said channel cutter and having aflange adapted to bear against said channel cutter to force the latteragainst one wall of said presser foot,said

shank portion of said clamping memberbe-i i ing provided with a taperedrecess, and a' screw threaded in said presser foot at right member andhavingatapered end portion adapted to cooperate with the tapered recessformed in the shank portion ofsaid clamping member.- a i i a V 10. Achannel cutting presser foot having a a groove in the front facethereof, a channel ter and having an annular groove formed thereinadapted to straddle said channel cutter. e 7

. 11. A channelcutter presser foot having a groove therein, a channelcutter slidable in said groove, means on said presser foot 00- operatingwith saidchannel cutter for moving the same transversely of said groove,said means comprising a screw threaded into said" 7 presser footsubstantially at right angles to said channel cutter and having anannular groove formed therein adapted to straddle said channel cutter,and means for clamping said channel cutter in said groove, said clamp-imeans comprising a clamping member having a shank'portion slidable insaid presser foot at right angles to said channel cutter and to saidscrew and having a cros'shead'extending beneath said channel cutter indirections transverse thereto, said shank portion of said clampingmember being provided with a tapered recess, and an adjusting screwthreaded into said presser foot at right-angles Y to sai dshank portionandhaving a tapered end portion adapted to engage the tapered recesstherein.

Signed at St. Louis, Missouri, this 4thday of September, 1931. I a

; 1 HARRY W. KRAG.

angles to the shank portion of said clamping cutter slidable in saidgroove, and means on i i a said presser foot cooperating with said channel cutter for moving the same transversely of said groove, said meanscomprising ,a' screw threaded into said presser foot substantially atright angles to saidchannel cut-

